From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6237C5B57E for ; Sun, 30 Jun 2019 13:55:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8167020663 for ; Sun, 30 Jun 2019 13:55:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="BJxT1NZ3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726722AbfF3NzK (ORCPT ); Sun, 30 Jun 2019 09:55:10 -0400 Received: from mail-io1-f68.google.com ([209.85.166.68]:38913 "EHLO mail-io1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726702AbfF3NzJ (ORCPT ); Sun, 30 Jun 2019 09:55:09 -0400 Received: by mail-io1-f68.google.com with SMTP id r185so22735708iod.6; Sun, 30 Jun 2019 06:55:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=HjT1gJzAymhKuycGEihYS7Q831Ru9lPvINuKZXjgWgw=; b=BJxT1NZ3xpEyljRaS4dTjrrdyaXTMcDPBeF9gh54gt+t7rHh2YVmFYWjEAHvtGvwSe 2Fx4DvFdFCscrhC1N6ZxYZRW3V1xTVpy4enFqhB+LlVHrVSjNsyKayE9pwyLj5kWg699 7aXFFclWECXQcrUKVCM5rX/y/cot7erfl0L04SP5CsSrGI1HZ1GCWqn00QJxtZ1qhPN1 4uUml2JDzVfKCurBCzUq5S7Y1tR6AVb3x6d0C/GgJ8MqIJk8QL5tDY+7AZ6fAI+pCeFe JfFVvwQjvbdZw7jr3rq1l4bY9eMY1FP1+Sj05TrGCb0j/rWp9UlJrvmWO2kfP7yuU9jj CEOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=HjT1gJzAymhKuycGEihYS7Q831Ru9lPvINuKZXjgWgw=; b=FZ/3JaCYbs2sj6D0AMmybddbAMy2vgrrzCAQzWW48WqDw/C+vBe/NbGZeLbcO0+Oey xtIVNHVg6r9pX/Ivxe8idFxreFWTcnTwO45TcBa7NprUj0Xf+DjqVaRcCCnkw77+2VHB L7AuHaj95WMxJy0RbgJgXbkTKAqm0YhPwHAL065SCOlYhwNp4Wb41hLk+8TDEMLkxo8K HJ2+a1UpPV8eTMfj1n/O6r/YUxK4lg3jgdqaVAV6qht/0qMVA5x5c9xp7b7zhEsvgfuP TQqPSeHUbMntkD7/LbzlZ+8vBQNF53e97ExDFnaNk/pasVO/S3MY1nsQoGjqJKqmYzPa iQJA== X-Gm-Message-State: APjAAAVWlIn0QYP4/tC4fiM+LlZn7Cpq4xV5mVy/Kgus/oQUjO6NVsPx mGUTJ/5Pfa7sHR5XKbZREQ== X-Google-Smtp-Source: APXvYqxuJhwZOIeVY0cv14IRWre/C8VidxFZ3pzhb+4jq3GjKeg7zLgd4WQEO4iyNRHXlPxk1oWaOA== X-Received: by 2002:a5d:8844:: with SMTP id t4mr20275195ios.91.1561902907674; Sun, 30 Jun 2019 06:55:07 -0700 (PDT) Received: from localhost.localdomain (50-124-245-189.alma.mi.frontiernet.net. [50.124.245.189]) by smtp.gmail.com with ESMTPSA id z17sm11930378iol.73.2019.06.30.06.55.06 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 30 Jun 2019 06:55:07 -0700 (PDT) From: Trond Myklebust X-Google-Original-From: Trond Myklebust To: "J. Bruce Fields" , Chuck Lever Cc: Jeff Layton , linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 13/16] nfsd: rip out the raparms cache Date: Sun, 30 Jun 2019 09:52:37 -0400 Message-Id: <20190630135240.7490-14-trond.myklebust@hammerspace.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190630135240.7490-13-trond.myklebust@hammerspace.com> References: <20190630135240.7490-1-trond.myklebust@hammerspace.com> <20190630135240.7490-2-trond.myklebust@hammerspace.com> <20190630135240.7490-3-trond.myklebust@hammerspace.com> <20190630135240.7490-4-trond.myklebust@hammerspace.com> <20190630135240.7490-5-trond.myklebust@hammerspace.com> <20190630135240.7490-6-trond.myklebust@hammerspace.com> <20190630135240.7490-7-trond.myklebust@hammerspace.com> <20190630135240.7490-8-trond.myklebust@hammerspace.com> <20190630135240.7490-9-trond.myklebust@hammerspace.com> <20190630135240.7490-10-trond.myklebust@hammerspace.com> <20190630135240.7490-11-trond.myklebust@hammerspace.com> <20190630135240.7490-12-trond.myklebust@hammerspace.com> <20190630135240.7490-13-trond.myklebust@hammerspace.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Jeff Layton Nothing uses it anymore. Signed-off-by: Jeff Layton Signed-off-by: Trond Myklebust Signed-off-by: Trond Myklebust --- fs/nfsd/nfssvc.c | 13 +---- fs/nfsd/vfs.c | 149 ----------------------------------------------- fs/nfsd/vfs.h | 6 -- 3 files changed, 1 insertion(+), 167 deletions(-) diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index a6b1eab7b722..d02712ca2685 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -317,22 +317,12 @@ static int nfsd_startup_generic(int nrservs) ret = nfsd_file_cache_init(); if (ret) goto dec_users; - /* - * Readahead param cache - will no-op if it already exists. - * (Note therefore results will be suboptimal if number of - * threads is modified after nfsd start.) - */ - ret = nfsd_racache_init(2*nrservs); - if (ret) - goto out_file_cache; ret = nfs4_state_start(); if (ret) - goto out_racache; + goto out_file_cache; return 0; -out_racache: - nfsd_racache_shutdown(); out_file_cache: nfsd_file_cache_shutdown(); dec_users: @@ -347,7 +337,6 @@ static void nfsd_shutdown_generic(void) nfs4_state_shutdown(); nfsd_file_cache_shutdown(); - nfsd_racache_shutdown(); } static bool nfsd_needs_lockd(struct nfsd_net *nn) diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index f26c364bdbb9..58b6d8df95d4 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -49,34 +49,6 @@ #define NFSDDBG_FACILITY NFSDDBG_FILEOP - -/* - * This is a cache of readahead params that help us choose the proper - * readahead strategy. Initially, we set all readahead parameters to 0 - * and let the VFS handle things. - * If you increase the number of cached files very much, you'll need to - * add a hash table here. - */ -struct raparms { - struct raparms *p_next; - unsigned int p_count; - ino_t p_ino; - dev_t p_dev; - int p_set; - struct file_ra_state p_ra; - unsigned int p_hindex; -}; - -struct raparm_hbucket { - struct raparms *pb_head; - spinlock_t pb_lock; -} ____cacheline_aligned_in_smp; - -#define RAPARM_HASH_BITS 4 -#define RAPARM_HASH_SIZE (1<i_sb->s_dev; - ino_t ino = inode->i_ino; - struct raparms *ra, **rap, **frap = NULL; - int depth = 0; - unsigned int hash; - struct raparm_hbucket *rab; - - hash = jhash_2words(dev, ino, 0xfeedbeef) & RAPARM_HASH_MASK; - rab = &raparm_hash[hash]; - - spin_lock(&rab->pb_lock); - for (rap = &rab->pb_head; (ra = *rap); rap = &ra->p_next) { - if (ra->p_ino == ino && ra->p_dev == dev) - goto found; - depth++; - if (ra->p_count == 0) - frap = rap; - } - depth = nfsdstats.ra_size; - if (!frap) { - spin_unlock(&rab->pb_lock); - return NULL; - } - rap = frap; - ra = *frap; - ra->p_dev = dev; - ra->p_ino = ino; - ra->p_set = 0; - ra->p_hindex = hash; -found: - if (rap != &rab->pb_head) { - *rap = ra->p_next; - ra->p_next = rab->pb_head; - rab->pb_head = ra; - } - ra->p_count++; - nfsdstats.ra_depth[depth*10/nfsdstats.ra_size]++; - spin_unlock(&rab->pb_lock); - - if (ra->p_set) - file->f_ra = ra->p_ra; - return ra; -} - -void nfsd_put_raparams(struct file *file, struct raparms *ra) -{ - struct raparm_hbucket *rab = &raparm_hash[ra->p_hindex]; - - spin_lock(&rab->pb_lock); - ra->p_ra = file->f_ra; - ra->p_set = 1; - ra->p_count--; - spin_unlock(&rab->pb_lock); -} - /* * Grab and keep cached pages associated with a file in the svc_rqst * so that they can be passed to the network sendmsg/sendpage routines @@ -2094,63 +2005,3 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp, return err? nfserrno(err) : 0; } - -void -nfsd_racache_shutdown(void) -{ - struct raparms *raparm, *last_raparm; - unsigned int i; - - dprintk("nfsd: freeing readahead buffers.\n"); - - for (i = 0; i < RAPARM_HASH_SIZE; i++) { - raparm = raparm_hash[i].pb_head; - while(raparm) { - last_raparm = raparm; - raparm = raparm->p_next; - kfree(last_raparm); - } - raparm_hash[i].pb_head = NULL; - } -} -/* - * Initialize readahead param cache - */ -int -nfsd_racache_init(int cache_size) -{ - int i; - int j = 0; - int nperbucket; - struct raparms **raparm = NULL; - - - if (raparm_hash[0].pb_head) - return 0; - nperbucket = DIV_ROUND_UP(cache_size, RAPARM_HASH_SIZE); - nperbucket = max(2, nperbucket); - cache_size = nperbucket * RAPARM_HASH_SIZE; - - dprintk("nfsd: allocating %d readahead buffers.\n", cache_size); - - for (i = 0; i < RAPARM_HASH_SIZE; i++) { - spin_lock_init(&raparm_hash[i].pb_lock); - - raparm = &raparm_hash[i].pb_head; - for (j = 0; j < nperbucket; j++) { - *raparm = kzalloc(sizeof(struct raparms), GFP_KERNEL); - if (!*raparm) - goto out_nomem; - raparm = &(*raparm)->p_next; - } - *raparm = NULL; - } - - nfsdstats.ra_size = cache_size; - return 0; - -out_nomem: - dprintk("nfsd: kmalloc failed, freeing readahead buffers\n"); - nfsd_racache_shutdown(); - return -ENOMEM; -} diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h index 31fdae34e028..e0f7792165a6 100644 --- a/fs/nfsd/vfs.h +++ b/fs/nfsd/vfs.h @@ -40,8 +40,6 @@ typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); /* nfsd/vfs.c */ -int nfsd_racache_init(int); -void nfsd_racache_shutdown(void); int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, struct svc_export **expp); __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *, @@ -80,7 +78,6 @@ __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, int, struct file **); __be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *, umode_t, int, struct file **); -struct raparms; __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, loff_t offset, unsigned long *count); @@ -118,9 +115,6 @@ __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, __be32 nfsd_permission(struct svc_rqst *, struct svc_export *, struct dentry *, int); -struct raparms *nfsd_init_raparms(struct file *file); -void nfsd_put_raparams(struct file *file, struct raparms *ra); - static inline int fh_want_write(struct svc_fh *fh) { int ret; -- 2.21.0